Final answer:
The charge nurse should assign the LPN to determine the swallowing ability of a client who had a stroke.
Step-by-step explanation:
The LPN (Licensed Practical Nurse) should be assigned to determine the swallowing ability of a client who had a stroke. The LPN can assess the client's ability to swallow safely and identify any signs of dysphagia. This task falls within the scope of an LPN's practice and does not require the advanced skills of a registered nurse.